Cinematographic film



's. KUCHARSKI.

GINEMATOGRAPHIC FILM.

APPLICATION FILED ocr. 1,1919.

1,42 3,770. I Patented July 25, 1922.

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UNITED STATES PATENT OFFICE.

STARISLAUS K' U'CKARSKI, OF CHABLOTTENBURG, NEAR BERLIN, GERMANY, ASSIGNOR 1'0 RICHARD A. HANSEMANN, OF BERLIN, GERMANY.

CINEHATOGBAPHIG FILH.

I To all whomit may concern:

' lottenburg, near Be it known that I, S'ramsmrrs KUCHAR- SKI, engineer, a citizen of Germany, residing at and whose st-oflice address is Charerlin, Dernburgstrasse 45, Germany, have invented certain new and useful Improvements in cinematographic which the pictures are automatically cen tered. Ordinary films bearing series of pic-' tures have two uniform series of holes near their edges, the number of holes per picture at each side being four. As these holes are perfectly uniform it often happens that a picture appears one or two holes too low or too high at the observation opening. It is then necessary to make the film register with' the said opening or window by means of a manually operated centering device.

A known means of avoiding this centering method consists in providing series of holes differing in pitch. But in the first place toothed drums with different teeth at either side are difiicult to make, and secondly, existing films are not suitable for the new arrangement of the perforations.

These disadvantages are avoided by this Specification o1 Iiettcrs Patent. I Patented July 25, 1922,

Application filed October 1, 1919. Serial No. 327,831.

.forations. In other words, at periodic intervals, corresponding to the length of film advanced for each picture, there is located a pair of perforations, which are elongated in a direction transverse .of the film, so that they are longer than the other perforations. While such elongated perforations are pref erably on the line of separation between ad- 'acent pictures, it is obvious that they may e arranged in any given relationship to the,

picture, for example, on the line of the middle of the icture, as long as the interval between ad acent pairs of elongated perforations is equal to theinterval between ad jacent pictures. a

By the use of the elongated-perforations a which are of the same dimension longitudinally as the other perforations, the arrangement is adaptable to standard size film and standard size pictures.

A film feeding device for feeding the film perforated according to the invention is shown in Figs. 2 and 3. The feeder d there shown is a reciprocatable element provided with a plurality of short teeth 6 adapted to engage in the smaller perforations e of the film, and with one or more longer and wider teeth 0 which, on account of their size, can only enter the larger perforations a. The teeth 0 being wider than any of the perforations 0 cannot enter any of such perforations'.

The device operates as follows: If the film is properly positioned for correct proinvention, the important point of which is\ jection on the screen, the wide teeth 0 engage providing, at periodic intervals equal to the distance the film is advanced for each picture, a pair of perforations which are elongated in a direction transversely of the film. A manner of carrying out the invention is illustrated in the drawing in whichi Fig. 1 shows the film with the elongated holes a,

Fig. 2 illustrates a side view and Fig. 3 a front view of the film shifting device.

The film shown in Fig. .1 is provided with the usual perforations 6, here shown as three in number, alongside each picture. That pair of perforations a on the line of separation between the pictures is, however, elongated in a direction transversely of the film, so that they are longer than the other perforations, but 10 'tudinally of the film they are of the same dimension as the other perinthe wide perforations a on each stroke of Suppose, however, the film is improperly positioned. This would mean that one of the perforations a would be above the tooth c, Fig. 2, a distance less than the-width of a picture. The feeder (1 would be raised its normal stroke, but due to the impro er positioning of the picture, there woul be no pair of perforations a in a position to receive the wide teeth 0. On the down stroke therefore, none of the teeth of the feeder al would engage with the film, because they would be held away therefrom by the longer and wider teeth 0 sliding down the film. However, as soon as the wide teeth 0 come opposite a pair of perforations a, theywould engage therein and advance the film; This advance would, of course, be a distance somewhat less than the normal advance for the feeder and advance the film one picture. v

each picture; at the endof such advance, however, it is evident that the film is properly positioned and that on the next stroke it will be advanced the normal amount. The corrective positioning isevidently automatic in character.

I claim: l

1. A film bearing a series of pictures provided with a number of holes near each edge for each picture one of which is larger than the others in a direction transverse to the length of the film but of the same dimensions film.

2. A film hearing-a series of pictures, provided With a number of holes-near each edge for each picture one of which is larger than the others, in a direction transverse to the length of the film but of the same dimensions in the longitudinal direction of the in the longitudinal direction of the film, each larger hole registering with a space between adjacent pictures.

3. The combination of a film bearing a series of pictures, provided with a number of holes near each edge for each picture one 

